Glass-press.



T. COLEMAN,- J1.

I PATBNTED 00T. 25, 1904.

GLASS' PRESS.

.111110111011 rum) AUG. a. 1901. 4

No MODEL. '2 sanne-SHEET 1.

FIG. l.

i: yi' i 3 7 gg El ga. I o D .s

/ 56 l ig; 56 EM I @i /1 :gi: ni 1 r a a M 40 |'i i .X l 2 5* n 4a f5' IIlm wlusssss: 7 mvl-:nron ,if www... (1MM jv ffm'zlzu No. 773,247. 1PATBNTED DGT/25, 1.904.

T. COLEMAN, JL

GLASS PRESS.

. h ArPLIo'ATIoH FILED AUG. s, 1901.

No MODEL. a MEETS-SHEET z.

FHS' El F154 WITIIISSES: INVENTOR i u I *l UNTTED STATES i PatentedOctober 25, 1904.

y PATENT OFFICE.

GLASS-PRESS.

SPECIFICATION forming part of Letters Patent No. 773,247, dated October25, 1904. Application filed August 3, 1901. Serial No. 70,774. (Nomodel.)

To all whom t 71am/ concern,.-

Be it known that I, THOMAS COLEMAN, J r., a citizen of the UnitedStates, residing at Clarksburg, in the county of Harrison and State ofl/Vest Virginia, have invented or discovered certain new and usefulImprovements in Glass- Presses, of which improvements the following is aspecification.

In pressing glassware it is desirable that the glass should at all timescompletely fill the mold, so as to produce perfect edges, and also thatthe glass should not be subjected to more than sufficient pressure tocause it to ll the mold, as otherwise the edges of the article will becrizzled or finely cracked by such eX- cess of pressure.

It is the object of the invention described herein to provide for thecutting off of `the active pressure on the glass so soon as the same hasbeen caused to completely lill the mold. i

The invention is hereinafter more fully described and claimed. g

In the accompanying drawings, forming a part of this specification,Figure 1 is a side elevation of a glass-pressing mechanism having myimprovements applied thereto. Fig. 2 is a diagrammatic view showingparts of the press and illustrating the circuitsv employed in one formor modification of my improvement. Fig. 3 is a sectional detail view ofa form of controlling apparatus, and Fig. 4 is an elevation of apreferred form of switch employed in connection with the apparatus shownin Fig. 1.

For convenience I have shown my improvement embodied in the form ofglass-pressing mechanism forming the subject-matter of Letters PatentNo. 671,757, granted to me April 9, 1901. As therein shown,the pressingmechanism consists of a revoluble table 2, carrying the series of molds1, a shaping-plunger secured to the lower end of a rod 35, attached tothe cores of a pressing-solenoid 32 and a lifting-solenoid 33. Thepresser-plate 38, carrying the mold-ring 81, is connected to the upperends of rods 40, whose lower ends are connected to or form the cores ofsolenoids 39, whereby the presser-plate and mold-rings are drawn downand held in position on the mold. As therein shown, the presser-plate isadapted to be lifted by means of a cross-head 36, connected to theplunger or rod 35, and provided with rods 37, which extend down throughthe presser-plate and have heads on their lower ends adapted to lift thepresserplate when the plunger is raised. The table is adapted to berotated by means of a solenoid 19, Whose circuit is controlled by themovement of the plunger, as fully set forth in the patent. referred to.A cut off mechanism adapted to sever the glass from the gatheringrod isarranged in suitable relation to the path of movement of the molds, suchcutting mechanism being operated by means of a solenoid 29.. It ispreferredthat means similar to that shown in the patent should beemployed for lifting the article after being pressed from the mold, suchmeans consisting of a movable bottom sectionfor the mold, having adownwardly-extending stem, which in a certain' predetermined position tothe table or molds will be in line with the core of a solenoid 42, thecircuit of such solenoid being controlled by switch 61, which in turn iscontrolled by the movement of the table. In order to stop the operationof the pressing-solenoid so soon as the glass has completely filled themold, suitable means are employed to break or reduce the current throughthe circuitsA through the holding-solenoids 39 and the pressing-solenoid32 so soon as the glass has been forced up against the mold-ring andexerted some pressure against the same, but not sufficient to effect anycrizzling or injury to the glass.

The circuits for the press mechanism shown in Figs. 1 and 2 are asfollows: The circuit for the pressing-plunger` starting from thegenerator A, consists of the Wire 82, rheostat or controller46, wire 83,manually-controlled switch 51, wire 84:,pressing-solenoid A32, and wire85 to the generator. The circuit for the holding-down solenoids 39consists of the wire 82, solenoids 39, switch 4:8, wire 86, automaticmake-and-break mechanism, and Wires 88 and 85 to the generator. Thismake-and-break mechanism is constructed in accordance with rules wellknown in the art, so, that when 'the load on the solenoidsgis abnormallyincreased the movable member of the switch will be forced out by theaction of the current, thereby breaking the circuit. Such a form of IOOswitch is shown in Fig. 4 and consists of the contacts 8O and 90, thelatter being secured to a level` 91, which is held in place by a spring92, whose tension is so adjusted as to hold the contact 9() between thecontacts 89 until the load on the circuit reaches a predetermined point,whereupon the current will force the lever outwardly and break thecircuit. As described in said patent. a rheostat 46 is arranged in thecircuit of the pressing-solenoid, the contact-piece of the rheostat orcontroller being operated in one direction to remove resistances fromthe circuit by a spring 79 and in the opposite direction to throw in theresistances by a solenoid 66. The circuit of the solenoid consists ofthe wire 82, the solenoid, wire 93, contact-piece 94, an arm 95 on thelever 91, and wire 88 to the generator. It will be observed that themovable member 95 of this switch is adapted to be moved by the lever 91when the same is forced outwardly by an increase in the load on thecircuit of the solenoids 39, thereby closing the circuit through thesolenoid 66 of the rheostat, whereby resistanees are forced into thecircuit of the pressing-solenoid, thereby reducing the operative effectof such solenoid upon the glass. So soon as the switch mechanismcontrolling these circuits has been shifted the operator shifts treadle54, openingswitch 51, therebyentirely breaking the circuit through thepressingsolenoid and closing the circuit through the lifting-solenoid33. As the plunger reaches its upper position and is free of the mold anarm 70 thereon closes the switch 59 of the circuit through thetable-shifting solenoid 19, so that the table is shifted, bringing a newmold into position under the plunger'. The upward movement of theplunger also shifts the lever 91 through the medium ofa projection, asthe cross-head 36, forcing its contact-piece in between thecontact-pieces 89, thereby closing at that point the circuit through thesolenoids r1`his circuit, however, will remain open at the switch 48until the table has been moved sufficiently far to bring a mold intoproper pressing position. As soon as this position is attained theswitch 48 is closed by a projection a on the table and the presser-platedrawn down by the solenoids 39. The operator then shifts the treadle 54,opening the circuit through the lifting-solenoid and closing it throughthe pressing-solenoid 32, whereby the plunger is forced down to shapethe glass in the mold. By the movement of the lever 91 on the upwardmovement of the plunger the circuit through the rheostat-sclenoid 66 isbroken, so that the spring 79 will shift the contact-piece of therheostat so to remove all or part ofthe resistances from the circuit ofthe pressing-solenoid.

In lieu of controlling the circuit of the holding and pressing solenoidsby an increase of load upon the solenoids due tothe upward pressure ofglass the circuits of such solenoids l maybe controlled by a switchmechanism operated by the mold ring itself, as clearly shown in Fig. 3.A desirable form of such mechanism consists of contact-plates 96,arranged upon the presser-plate 38 and adapted to be shifted to open thecircuit through the pressing-solenoid by the movement of the glass inthe mold or by the mold-ring 81. The movement can be communicated to thecontact-pieces 96 by means of a pin 97, adapted to be shifted by themovement of the moldring when the latter is lifted by the upwardmovement of the glass against the same. The mold-ring` is preferablyheld in suitable relation to the presser--plate by means of springs 98,which are so adjusted with regard to their tension as to withstand acertain pressure before permitting of the movement of the ring.

Thile having described and shown my in vention in connection with anelectrically operated or controlled glass-pressing mechanism` it will bereadily understood to those skilled in the art that the improvement canbe applied to other forms of glass-pressing mechanism, and hence I donot limit myself as regards the broad terms of the claims to anyparticular form or construction of glass-pressing mechanism, but includeas within the terms of the invention any suitable mechanical devicesinterposed between the power and the mold-ring or the glass within themold, whereby the forming action of the pressing mechanism is controlledby the movement of the glass within the mold.

I claim herein as my invention- 1. A glass-press having in combination apressing mechanism, a mold, and means operative by the upward movementof the glass in the mold to produce a gradual reduction of the formingaction of the pressing mechanism on the glass, substantially as setforth.

2. A glass-press having in combination a pressing mechanism, a mold, amold-ring and means operative by thc upward pressure of glass on themold-ring to produce a gradual reduction of the forming action of thepressing mechanism, substantially as set forth.

3. A glass-press having in con'lbination a pressing mechanism, a moldand electricallyoperated means controlled by the upward movement of theglass in the mold to produce a gradual reduction of the forming1 actionof the pressing mechanism,su bstantially as set forth.

4. A glass-press having in combination an electrically-operated pressingmechanism, a mold, a mold-ring, and means operated by upward pressure ofglass on the mold-ring to produce a gradual reduction of the formingaction of the pressing mechanism.

1n testimony whereof I have hereunto set my hand.

THOMAS COLEMAN, J R. Vitnesses:

HALLER H. Dawson, J Amis N. DAVID.

